2 ms·
It is worth nothing that hashing phone numbers without salt is basically useless, and you can't do a lookup like this if salted. North America only has 10M poss
by kevincox 6y ago
It is worth nothing that hashing phone numbers without salt is basically useless, and you can't do a lookup like this if salted. North America only has 10M possible phone numbers so brute forcing or building a rainbow table is trivial. I don't know about other country codes but I presume the situation is pretty similar.
- protomyth 6y agoSignal does it https://support.signal.org/hc/en-us/articles/360007061452-Does-Signal-send-my-number-to-my-contacts- https://support.signal.org/hc/en-us/articles/360007061452-Do...